WO1999041450A1 - Steam box - Google Patents

Steam box Download PDF

Info

Publication number
WO1999041450A1
WO1999041450A1 PCT/FI1999/000104 FI9900104W WO9941450A1 WO 1999041450 A1 WO1999041450 A1 WO 1999041450A1 FI 9900104 W FI9900104 W FI 9900104W WO 9941450 A1 WO9941450 A1 WO 9941450A1
Authority
WO
WIPO (PCT)
Prior art keywords
steam
spindle
box
valve
steam box
Prior art date
Application number
PCT/FI1999/000104
Other languages
English (en)
Finnish (fi)
French (fr)
Inventor
Seppo Tavi
Original Assignee
Valmet Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valmet Corporation filed Critical Valmet Corporation
Priority to AU24262/99A priority Critical patent/AU2426299A/en
Publication of WO1999041450A1 publication Critical patent/WO1999041450A1/en

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00Other details of machines for making continuous webs of paper
    • D21F7/008Steam showers

Definitions

  • the invention relates to a steam box in a paper/board machine for passing steam into connection with a paper/board web.
  • the applicant's earlier FI 945969 patent application discloses a steam box structure which comprises a blower part and a separate steam distributor frame and a connecting duct therebetween.
  • the apparatus comprises separate valves through which steam can be passed from the distributor frame through the valves into hoses and further into a distribution chamber/chambers of the blower part and further into connection with a steam distribution surface/a board web/a paper web.
  • the regulation valves for regulating the flow of steam into the distributor part are situated in a different unit from that of the discharge surface of steam. The regulation valves can thus be placed more readily in a location where it is easy to service them.
  • This application discloses a totally novel type of arrangement for a steam box structure.
  • the invention proposes using a separate cassette which contains steam regulation valves and which can be removed from inside the steam box on support of guides.
  • the cassette can be removed to a service position or moved altogether out of connection of a machine for servicing.
  • the steam box in accordance with the invention is characterized by what is set forth in the claims.
  • Figure 1 A is an axonometric view of a steam box from the front.
  • Figure IB is an axonometric view of the steam box and from the rear. Dashed lines illustrate a valve cassette and steam feed compartments which are situated inside the steam box and through which steam can be fed from a profiled web width into connection with the web.
  • Figure 2 shows a section I— I of the steam box illustrated in Fig. 1A.
  • Figure 3 is an axonometric view of taking the valve cassette out of the interior of the steam box.
  • Figure 4 shows a section II— II of Fig. IB, i.e. the valve cassette and the steam box in a running position.
  • Fig. 1A shows a steam box 10 in connection with a paper/board web.
  • the flow of steam into connection with the paper /board web can be regulated by regulating the supply of steam into different feed sections A 1 ,A 2 ... (different feed sections of the steam box) by means of valves arranged across the width of the steam box.
  • the steam box may comprise a structure by means of which steam is passed into a constant steam feed section A 100 at the inlet side 50' of a steam discharge surface 50 of the steam box (viewed in the direction of run of the web).
  • feed sections A ⁇ A ⁇ A ... At the outlet side 50" of the steam discharge surface 50, there are situated feed sections A ⁇ A ⁇ A ..., of which there are a plurality across the width of the steam box.
  • Fig. IB shows the steam box from the rear.
  • the steam feed sections A j ,A 2 ... are arranged across the width of the steam box, and steam can be passed from an inlet chamber 11 through the valves 12a 1 ; 12a 2 ... of a valve cassette 14 into each section A 1 ,A 2 ,A 3 ..., as desired.
  • the figures show an embodiment in which the steam box is disposed in connection with a cylinder surface, in which connection the discharge surface for the steams of the box is curved.
  • the invention is also suitable for straight steam boxes.
  • the shape of the steam box is not restricted in any way.
  • Fig. 2 shows a section I— I of Fig. 1A.
  • steam is passed through an inlet tube into the distribution chamber 11 of the steam box 10 and therefrom, for example, through the valve 12a j into the steam feed section Ai .
  • the supply of steam into the feed section A j and further the disch-arge of steam through a discharge surface A ⁇ of the feed section A t into connection with a paper/board web are regulated by moving a spindle of the valve 12S ⁇ . Openings O l 5 O 2 of a spindle tube 13a ⁇ of each valve 12a 1 ; 12a 2 ... open into the space 11, in which connection steam enters a spindle cavity E of the valve 12a 1 ,12a 2 ...
  • valves 12a ⁇ ,12a 2 ... are situated in the movable valve cassette 14.
  • the valves 12a 1; 12a 2 ... are attached to the cassette 14, which is a box-shaped elongated frame part, the spindle 12b of the valve lla ⁇ extending through a frame surface Ma j of said frame part.
  • the position of the valve spindle 12b can be adjusted by adjusting the position of the spindle by means of air pressure.
  • the spindle tube 13a is advantageously a flexible, e.g. bellows-like structure, which is positioned at its end 13b, for example, around the steam inlet opening Ji in the wall T j of the feed section A j when the cassette 14 is in a running position.
  • the cassette 14, being an elongated box-shaped structure, 4 comprises tube connections e 1( e 2 inside it for each valve 12a 1 ; 12a 2 ... for adjusting the position of each of them by means of air pressure.
  • the air pressure can be passed into a space N on the other side of a piston 12c of the spindle 12b of the valve 12a j , 12 2 ....
  • the spindle 12b can be pressed against the spring force of a spring 13c to a desired regulation position.
  • the cassette 14 preferably comprises wheels, guides or equivalent 15a ⁇ , 15a 2 ... , on whose support the cassette 14 can be brought from a running position to a servicing position.
  • an actuator 16 preferably, for instance, an elongated loading hose, for pressing the end of the spindle tube 12b into contact with the wall T, of the feed section A l when the cassette 14 is in the running position.
  • the cassette 14 is guided by means of a pull-out casing 17, which defines a steam inlet chamber D j inside it.
  • the pull-out casing 17 extends sideways perpendicularly to the machine direction of a paper/board machine and, by means of the pull-out tube 17, the cassette 14 can be drawn sufficiently out of connection of the steam box structures to allow servicing operations.
  • the cassette 14 has been drawn to a servicing position from inside the pull- out tube 17.
  • Fig. 4 shows a section II— II of Fig. 1.
  • Connecting hoses f ⁇ ,f 2 ... are connected to the ends of the tubes e 1 ,e 2 at the end of the cassette 17.

Landscapes

  • Paper (AREA)
PCT/FI1999/000104 1998-02-13 1999-02-11 Steam box WO1999041450A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU24262/99A AU2426299A (en) 1998-02-13 1999-02-11 Steam box

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FIU980081 1998-02-13
FI980081U FI3463U1 (sv) 1998-02-13 1998-02-13 Ånglåda

Publications (1)

Publication Number Publication Date
WO1999041450A1 true WO1999041450A1 (en) 1999-08-19

Family

ID=8550401

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1999/000104 WO1999041450A1 (en) 1998-02-13 1999-02-11 Steam box

Country Status (3)

Country Link
AU (1) AU2426299A (sv)
FI (1) FI3463U1 (sv)
WO (1) WO1999041450A1 (sv)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1310591A2 (de) * 2001-11-08 2003-05-14 Voith Paper Patent GmbH Dampfblaskasten
DE10220377A1 (de) * 2002-05-07 2003-11-20 Voith Paper Patent Gmbh Dampfblaskasteneinheit
US7475496B2 (en) 2002-05-07 2009-01-13 Voith Paper Patent Gmbh Steam blower box unit
EP2128333A1 (en) 2008-05-31 2009-12-02 ABB Ltd. A steam shower having improved maintenance access
US7634860B2 (en) 2004-05-03 2009-12-22 Transphase Technology, Ltd. Steam box
US7871494B2 (en) * 2008-01-09 2011-01-18 Honeywell Asca Inc. Drop-out steam profiling cartridge
DE102015217369A1 (de) * 2015-09-11 2017-01-05 Voith Patent Gmbh Dampfblaskasten
RU2764086C1 (ru) * 2019-10-15 2022-01-13 Айбиэс Оф Америка Система, система управления, система контроля и способ управления и очистки парового ящика
US11421383B2 (en) 2019-08-27 2022-08-23 Andritz Inc. Steam box with multiple valves and diffuser plates and related system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI95404B (sv) * 1994-12-20 1995-10-13 Valmet Paper Machinery Inc Ånglåda i pappers-/kartongmaskin

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI95404B (sv) * 1994-12-20 1995-10-13 Valmet Paper Machinery Inc Ånglåda i pappers-/kartongmaskin

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10154828A1 (de) * 2001-11-08 2003-05-15 Voith Paper Patent Gmbh Dampfblaskasten
EP1310591A3 (de) * 2001-11-08 2004-05-12 Voith Paper Patent GmbH Dampfblaskasten
EP1310591A2 (de) * 2001-11-08 2003-05-14 Voith Paper Patent GmbH Dampfblaskasten
DE10220377A1 (de) * 2002-05-07 2003-11-20 Voith Paper Patent Gmbh Dampfblaskasteneinheit
WO2003095742A1 (de) * 2002-05-07 2003-11-20 Voith Paper Patent Gmbh Dampfblaskasteneinheit
US7475496B2 (en) 2002-05-07 2009-01-13 Voith Paper Patent Gmbh Steam blower box unit
US7634860B2 (en) 2004-05-03 2009-12-22 Transphase Technology, Ltd. Steam box
US7871494B2 (en) * 2008-01-09 2011-01-18 Honeywell Asca Inc. Drop-out steam profiling cartridge
EP2128333A1 (en) 2008-05-31 2009-12-02 ABB Ltd. A steam shower having improved maintenance access
US8187426B2 (en) * 2008-05-31 2012-05-29 Abb Ltd. Steam shower having improved maintenance access
DE102015217369A1 (de) * 2015-09-11 2017-01-05 Voith Patent Gmbh Dampfblaskasten
US11421383B2 (en) 2019-08-27 2022-08-23 Andritz Inc. Steam box with multiple valves and diffuser plates and related system
RU2764086C1 (ru) * 2019-10-15 2022-01-13 Айбиэс Оф Америка Система, система управления, система контроля и способ управления и очистки парового ящика
US11313077B2 (en) 2019-10-15 2022-04-26 Ibs Of America System, control system, an inspection system, and a method of controlling and cleaning a steam box
US11828024B2 (en) 2019-10-15 2023-11-28 Ibs Of America System, control system, an inspection system, and a method of controlling and cleaning a steam box

Also Published As

Publication number Publication date
FI3463U1 (sv) 1998-07-10
FIU980081U0 (sv) 1998-02-13
AU2426299A (en) 1999-08-30

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